449.Generally, the wheels of airplanes are attached to the shock struts, and oil or air is used by the struts to relieve the impact of landing ( )

488.Install the forward cargo compartment aft bulkhead center panel( )

487.The Table of Contents required by paragraph 09 of this Specification may be in the form of a log [or list] of the Supplements( )

486.这个程序这时不适用。( )

485.This boiler controller is applicable to all systems thus, it can also control thermal oil heaters ( )

484.This procedure should be done a minimum of 2 hours after the last aircraft operation This will make sure that the shock absorber values recorded are accurate ( )

483.For a fly-by-wire[FBW] system , the manual flight control of an aircraft is replaced by an electronic interface ( )

482.上端连接至转向环、下端连接至减震支柱内油缸的扭转连杆传递转动力矩。 ( )

481.Before you Servicing of the oxygen-Replenishing, stop all refueling, all repairs on fuel and hydraulic systems , and all procedures that use flammable materials such as cleaning and de-icing materials ( )

480.Unfold the sheeting carefully ( )

479.不要使用可能引起火花的测试设备 ( )